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Naryna's questions

Martin Hope
Naryna
Asked: 2016-02-04 09:21:19 +0800 CST
  • 1

This is really just a question about best practices as there seems to be a little confusion. The physical hosts of our Hyper-V cluster have 4 Nic interfaces relating to the 4 subnets.

Now, when running the best practices analyzer, it loves to complain that most of these interfaces can't talk to each other. This is because all but one of the Nics have no gateway defined in the static settings. I was under the impression that best practice was to define only the one gateway, but I could be wrong.

So, the question:

Is it best practice to define one gateway per server, per subnet or per nic (in a cluster environment)? And, What are the effects of defining multiple gateways on a cluster environment?

windows-server-2012-r2
Martin Hope
Naryna
Asked: 2016-02-02 11:59:57 +0800 CST
  • 5

What is the best way to force VLAN segregation accross multiple Virtual switches?

I have probably a rather complex setup going in the effort to get essentially 4 separate virtual switches.

The incoming line is a 10Gbe teamed connection in trunk mode which I then add to an external virtual switch and create 4 virtual nics for the management OS each set to access mode in the VLAN I want. Then I have four internal virtual switches created. Four being the number of VLANs I want to segregate out.

Now, I can set each NIC to access mode in the VLAN I want and then create on big bridge. Voila, all of the virtual servers can see the internet and can access the VLAN they need. But, there are a few problems. First, if I set any server to DHCP, then it only gets DHCP from the default vlan instead of whichever VLAN the switch should be assigned to. Second, I can actually assign an IP from any of the VLANs and the server will still communicate, no matter what the switch is supposed to do.

I understand the concepts of what is going on. Because everything is set in access mode it all sends untagged frames so once it finally gets to the bridge, it translates everything into the native (untagged) VLAN. My only problem is, I can't find a way to specify tagged frames. Or, better yet, to create 4 network bridges, one for each VLAN.

Any suggestions?

virtualization